18. James Grosfeld

Retired Chairman & CEO

PulteGroup Inc.

James Grosfeld has stayed active — and successful — as an investor in retirement. In late 2012, his Southfield-based Dawson Investments LLC purchased 5.49 percent of American Greetings Corp. at prices ranging from $16.83 to $17.15 a share and profited when the company went private 10 months later at a buyout price of $19 a share.

A director at asset-manaager BlackRock Inc. since 1999, he made a notable insider purchase in 2012 when he bought 500,000 shares at an average price of $186. The stock now trades in the $340 range, and according to he still holds about 523,000 shares.